No, you can show your ticket QR Code on your mobile device. Yes Print if you do not carry your phone to the venue or do not have one.
In Certain Venues where QR codes are not scanned you may be only asked to show your name on the ticket..Once the Qr Code is Scanned and Validated or Names cross referenced with the Door list held at the Desk you will be given entry. Venue Terms & Condition Apply. You will find this on the Venue website.